I have installed all components for the Wayland and the Wayland almost Heaven but some GTK3 application made problem. For example: Libreoffice (bad fonts, window buttons are broken and other problems, Inkscape trunk (freeze at the start). If I execute them in sudo everything is OK Inkscape can start libreoffice looks well. (KDE neon all versions)
you need to use the gtk theme for libreoffice. The problem is that the KDE integration does not support Wayland yet at all. You need to report this to the developers of the libreoffice integration.